SmogRank / World / Mexico / March 2026

Most polluted cities in Mexico, March 2026

45 cities in Mexico ranked by their average PM2.5 over the 31 days. Worst: Aguascalientes at 35.4 µg/m³, #185 of 2,947 cities in the world. Cleanest: Heroica Matamoros at 9.5. A city needs measurements on 70% of the days to be ranked.

Ranked by unhealthy days: the share of each city's measured days with a daily mean over 35.4 µg/m³ (US AQI 101+), Unhealthy for Sensitive Groups or worse on the US EPA's scale. Ties go to the higher average.

← Aguascalientes 29% 20%0
Every city in Mexico ranked for March 2026, one column each, ranked by unhealthy days: height is the share of its measured days that were unhealthy, colour its average. Point at it to read a city; tap to open it.
  1. 1AguascalientesAguascalientes
    29%
  2. 2San Antonio la IslaMéxico
    21%
  3. 3XonacatlánMéxico
    16%
  4. 4Zacatepec de HidalgoMorelos
    16%
  5. 5TlaquepaqueJalisco
    13%
  6. 6MexicaliBaja California
    10%
  7. 7PueblaPuebla
    10%
  8. 8Mixquiahuala de JuárezHidalgo
    5%
  9. 9TehuacánPuebla
    4%
  10. 10Pachuca de SotoHidalgo
    4%
  11. 11Hacienda Santa FeJalisco
    3%
  12. 12Mexico CityMexico City
    3%
  13. 13GuadalajaraJalisco
    3%
  14. 14CuernavacaMorelos
    3%
  15. 15Ciudad JuárezChihuahua
    3%
  16. 16TijuanaBaja California
    0%
  17. 17CelayaGuanajuato
    0%
  18. 18Atotonilco de TulaHidalgo
    0%
  19. 19Tetela del VolcánMorelos
    0%
  20. 20San MarcosHidalgo
    0%
  21. 21Santiago de QuerétaroQuerétaro
    0%
  22. 22TulancingoHidalgo
    0%
  23. 22SalamancaGuanajuato
    0%
  24. 24IrapuatoGuanajuato
    0%
  25. 25Santa CatarinaNuevo León
    0%
  26. 25Santa AnitaJalisco
    0%
  27. 27Tula de AllendeHidalgo
    0%
  28. 27La Providencia Siglo XXIHidalgo
    0%
  29. 29TlaxcalaTlaxcala
    0%
  30. 29León de los AldamaGuanajuato
    0%
  31. 31MonterreyNuevo León
    0%
  32. 32San Juan del RíoQuerétaro
    0%
  33. 33San Miguel de AllendeGuanajuato
    0%
  34. 33Ciudad Benito JuárezNuevo León
    0%
  35. 35NogalesSonora
    0%
  36. 36ZapopanJalisco
    0%
  37. 36Ciudad General EscobedoNuevo León
    0%
  38. 38Ciudad ApodacaNuevo León
    0%
  39. 39AbasoloGuanajuato
    0%
  40. 40Cadereyta JiménezNuevo León
    0%
  41. 41PesqueríaNuevo León
    0%
  42. 42GuanajuatoGuanajuato
    0%
  43. 43GarcíaNuevo León
    0%
  44. 44La PazBaja California Sur
    0%
  45. 45Heroica MatamorosTamaulipas
    0%
Good0–50
Moderate51–100
Sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+

The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales

All cities in the world, March 2026 · Mexico now

Regions

Aguascalientes 1Baja California 2Baja California Sur 1Chihuahua 1Guanajuato 7Hidalgo 7Jalisco 5México 2Mexico City 1Morelos 3Nuevo León 8Puebla 2Querétaro 2Sonora 1Tamaulipas 1

Ranked cities in each region, March 2026.

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SmogRank, most polluted cities in Mexico, PM2.5, March 2026, smogrank.com/mx/history/2026-03 (accessed 7 Oct 2026).

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